Aster Plants

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  1. Aster Bushes
  2. Winterizing Asters
  3. Stokes Aster Wilting
  4. Does asters yellow contaminate the soil?
  5. annual asters wilting and dying
  6. worms in asters
  7. green asters do not bloom
Asked by Anonymous on October 26, 2011
Aster Bushes

The aster bushes at our park have gotten some mildew (I think). It starts at the base and works its way upward, but the plant still blooms and is beautiful at the crown. Any input to help will be greatly appreciated.

ANSWERS
Nikki
Certified GKH Gardening Expert

Treat the plant with a fungicide. We like neem oil, which is both an organic pesticide and fungicide. Here is more info: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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Asked by sharney on November 11, 2012
Winterizing Asters

I’ve never had asters before. Do I treat them like mums? How to treat asters over winter.

ANSWERS
Nikki
Certified GKH Gardening Expert

The hardy types do not require any special attention over winter. It does help to leave the foilage as added protection during winter freezes, or you can cover with mulch. Once new growth begins in spring, any old growth may be pruned back.

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Asked by Anonymous on May 28, 2014
Stokes Aster Wilting

My Stokes asters are wilting from the top down and then melting. This is happening in several areas of the bed. This happened last year but it is worse this year. The area affected last year appears to have come back even after removing the stems of the wilted plants.

ANSWERS
Nikki
Certified GKH Gardening Expert

Are they yellowing too? If so, your plants may be infected with fusarium wilt disease, which is common in asters and many other plants. Here is more information: https://www.gardeningknowhow.com/plant-problems/disease/controlling-fusarium-wilt.htm

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Asked by MNist on June 23, 2015
Does Asters Yellow Contaminate the Soil?

I have a clear case of asters yellow in one of my favorite coneflowers. Of course, I will destroy it, but wonder if I can plant a new one in its spot next year? I would hate to keep losing plants.

Thanks.

ANSWERS
Downtoearthdigs
Certified GKH Gardening Expert

From all the research I looked at, no it does not stay in the soil. It has to live in the host plant.
I think I would wait and make sure all the roots were gone from the location.
Here are a few articles.

https://www.gardeningknowhow.com/plant-problems/disease/aster-yellows-disease.htm
https://www.ag.ndsu.edu/cpr/plant-pathology/understanding-aster-yellows-7-26-12

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Asked by Anonymous on July 6, 2015
Annual Asters Wilting and Dying

Why do my annual asters wilt and die just before getting ready to blossom, after being healthy for over a month?

ANSWERS
Downtoearthdigs
Certified GKH Gardening Expert

Are they yellowing too? If so, your plants may be infected with fusarium wilt disease, which is common in asters and many other plants. Here is more information: https://www.gardeningknowhow.com/plant-problems/disease/controlling-fusarium-wilt.htm

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Asked by lkeres322 on August 10, 2015
Worms in Asters

I found two worms, each in the flower bud of my perennial Aster plant. I pulled them out. How can I treat this problem? Will it spread to the entire plant? This is my first experience with the perennial Aster. It is in a partial sun/shade location. How should I feed it and do I need to spray for insects?

ANSWERS
shelley
Certified GKH Gardening Expert

A photo would aid in my identification as there is a wide range of worm-like pests that attack asters including beet armyworms, cabbage loopers, carnation leafrollers, corn earworms, cutworms and omnivorous leaftiers. Hand picking the pests as you have done is typically recommended although some might advocate the use of Bacillus thuringiensis.

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Asked by ToniaK on August 31, 2015
Green Asters Do Not Bloom

I have beautiful, full green asters but they do not bloom. What am I doing wrong? When I originally purchased them, I believe in 2011, they bloomed in mid to late July. They are full and green ans otherwise appear “happy”. They do have tight closed buds. Am I just premature in asking and not waiting long enough? Also, should I be pruning them back? If so, when is the best time of year? Thanks in advance!

ANSWERS
Downtoearthdigs
Certified GKH Gardening Expert

Aster's do generally bloom later in the summer but you may have an issue with to much Nitrogen in the soil.
This will cause lush green plants with little to no flowering.

By adding Phosphorous you can promote flowering. Bone Meal is a good way to do this.

Here are some links for you.

https://www.gardeningknowhow.com/ornamental/flowers/asters/growing-asters.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm

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